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Plant Database

Search for native plants by scientific name, common name or family. If you are not sure what you are looking for, try the Combination Search or our Recommended Species lists.

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Polygonum robustius

Polygonum robustius (Small) Fernald

Coarse Smartweed, Robust Knotweed, Stout Smartweed

Polygonaceae (Buckwheat family)

Synonym(s): Persicaria robustior, Polygonum punctatum var. majus, Polygonum punctatum var. robustius

USDA Symbol: PORO

USDA Native Status: L48 (N), PR (N), CAN (N)

 

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Plant Characteristics

Duration: Perennial
Habit: Herb
Fruit Type: Achene
Size Notes: Up to about 6-1/2 feet tall.

Bloom Information

Bloom Color: White , Green
Bloom Time: Jul , Aug , Sep , Oct

Distribution

USA: CT , FL , IN , KY , MA , MD , MI , MO , NH , NJ , NY , OH , PA , RI , TX , VA
Canada: NS , ON , QC
Native Habitat: Peaty shores, often in water on coastal plain or near coast.

National Wetland Indicator Status

Region:AGCPAKAWCBEMPGPHIMWNCNEWMVE
Status: OBL UPL OBL OBL OBL
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

Web Reference

Webref 3 - Flora of North America (2014) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Polygonum robustius in USDA Plants
FNA: Find Polygonum robustius in the Flora of North America (if available)
Google: Search Google for Polygonum robustius

Metadata

Record Modified: 2020-11-12
Research By: CBR

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